Effects of corn processing, dietary roughage level, and timing of roughage inclusion on performance of feedlot steers

Journal of Animal Science
S C Loerch, F L Fluharty

Abstract

In Trial 1, 108 crossbred steer calves (initial BW 295 kg) were allotted to 12 pens and used in a 186-d feedlot trial to determine the effects of increasing or decreasing roughage level on feedlot performance and carcass characteristics. Four dietary treatments were investigated: 1) 85% concentrate diet fed for 186 d, 2) 100% concentrate diet fed for 186 d, 3) 85% concentrate diet fed for 84 d followed by a 100% concentrate diet for the remaining 102 d, and 4) 100% concentrate diet for 84 d followed by an 85% concentrate diet for the remaining 102 d. Corn silage was added as roughage. During the first 84 d, level of dietary concentrate did not affect (P > .10) ADG. Steers switched to the 85% concentrate diet for the last 102 d had higher (P < .05) DMI than those fed the 100% concentrate diet; they did not exhibit an increase in ADG. Finishing phase feed efficiency was highest (P < .05) for steers continually fed 100% concentrate, lowest (P < .05) for steers continually fed 85% concentrate, and intermediate for steers whose concentrate level was switched during the trial. Carcass characteristics were not affected (P > .10) by concentrate level regimen. In Trial 2, 108 crossbred steer calves (initial BW 319 kg) were allotted to 1...Continue Reading

Citations

Oct 13, 2009·Pakistan Journal of Biological Sciences : PJBS·M Atiqur RahmanM Shahjalal
Nov 19, 2014·Journal of Animal Science·C L MaxwellC J Richards
Feb 12, 2005·Journal of Animal Science·M A Gorocica-Buenfil, S C Loerch
Mar 17, 2010·Journal of Animal Science·M L MayJ S Drouillard
Mar 24, 2012·Animal : an International Journal of Animal Bioscience·A G FaleiroA Ferret

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